As you have asked about the 3 star hotels in Chennai, I am mentioning them, check below for the details

Hotel Breeze
3-star hotel
Address: 850, Poonamallee High Road, Chennai City Center, Kilpauk, Chennai, Tamil Nadu 600010
Phone:090908 08000

Hotel Ambica Empire
3-star hotel
Address: #79, 100 Feet Road, Vadapalani, Chennai, Tamil Nadu 600026
Phone:044 2362 1818

Ginger Hotel in Chennai (IITM)
3-star hotel
Address: Iitm No. 1 FA, 11th Floor, Behind Tidel, IIT Madras Research Park, Kanagam Rd, Kanagam, Park Town, Chennai, Tamil Nadu 600113
Phone:044 6666 3333

Southern Crest
3-star hotel
Address: Old #2, New #3, Venkatanarayana Road, T.Nagar, Chennai, Tamil Nadu 600017
Phone:044 2431 3335

Royal Regency
3-star hotel
Address: 26 & 27, Poonamallee High Road, Periamet, Chennai, Tamil Nadu 600003
Phone:044 4934 7777

Deccan Plaza
3-star hotel
Address: 36, Royapettah High Road, Chennai, Tamil Nadu 600014
Phone:044 6677 3333

The Hotel Royal Plaza Chennai
3-star hotel
Address: No. 3, E Road, Opposite to Koyambedu Market, Tiruvalluvar Sreet, Koyembedu, Chennai, Tamil Nadu 600107
Phone:044 2379 0066

Priyadarshini Park
3-star hotel
Address: Old No.123, New No.139, Wallajah Road, Mount Road, Chennai, Tamil Nadu 600002
Phone:044 4344 0800

Keys Hotel Katti Ma, Chennai
3-star hotel
Address: 23,, 11, Kalakshetra Rd, Thiruvanmiyur, Chennai, Tamil Nadu 600041
Phone:044 4900 2051

Gemini Inn
3-star hotel
Address: 31, G.N.Chetty Road, Near Gemini Flyover, T.Nagar, Chennai, Tamil Nadu 600006
Phone:044 2435 6999